Home / 4,085.76-6,128.55-1,312.32

Finding the Fourth Proportional to 4,085.76, 6,128.55 and 1,312.32

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Solution

The fourth proportional to 4,085.76, 6,128.55 and 1,312.32 is: 1,968.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,085.76 : 6,128.55 = 1,312.32 : x
  2. Step 2: Convert to fraction form
    4,085.76/6,128.55 = 1,312.32/x
  3. Step 3: Cross multiply
    4,085.76x = 6,128.55 × 1,312.32
  4. Step 4: Simplify right side
    4,085.76x = 8,042,618.74
  5. Step 5: Solve for x
    x = 8,042,618.74/4,085.76
  6. Step 6: Final answer
    x = 1,968.45

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Half scale
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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.